In the 1970s, 'The Six Million Dollar Man' became one of television’s defining sci-fi hits. The series followed astronaut Steve Austin, who survives a catastrophic test-flight crash only to be rebuilt — at immense expense — with "bionic" limbs that let him pull off superhuman feats. He goes on to work as a spy, dispatching the standard parade of villains along the way. The role turned Lee Majors into a household name, delivering 99 episodes and six TV movies. It also helped cement his celebrity status — Farrah Fawcett became…